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arXiv 2303.02728hep-th
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$\kappa$ 闵可夫斯基时空的对称性:奇异动量空间几何的一种可能性?

Symmetries of $κ$ Minkowski space-time: A possibility of exotic momentum space geometry?

Partha Nandi, Anwesha Chakraborty, Sayan Kumar Pal, Biswajit Chakraborty, Frederik G Scholtz

AI总结:

本文研究$\kappa$-Minkowski型非对易时空的庞加莱对称性,构建满足形变色散关系的无自旋有质量粒子模型,探究动量空间弯曲的量子引力情形,发现非对易性导致粒子质量重整化且普朗克质量为其上限。

摘要:

对量子引力现象学的探索催生了时空的量子化概念,这促使我们研究某一特定量子时空模型的相对论对称性的演变,以及它与可能涌现的弯曲“物理动量空间”的内在关联。本文聚焦于$\kappa$-Minkowski型非对易(量子)时空的庞加莱对称性问题:在该模型中,庞加莱代数本身保持未形变,但为了保留时空非对易(NC)代数的结构,代数生成元在算子值时空流形上的作用必须是包络代数值的,这类包络代数存在于整个相空间中,即(经典层面上的)时空流形的余切丛。此外,我们利用几何拉格朗日量的一阶形式,构建了一个满足形变庞加莱对称性的无自旋相对论性有质量粒子模型,该模型满足一种新的形变色散关系,并探究了未来量子引力理论中动量空间发生弯曲的一种可行情形。在这一情形下,仅存在一个质量标度(普朗克质量$m_{p}$),而不存在长度标度。最后,我们将形变的质壳与该弯曲动量空间中的测地距离联系起来,其中粒子的质量会因非对易性发生重整化。我们证明,在某些情况下,普朗克质量为观测到的重整化质量提供了一个上限。

英文摘要:

The quest for a quantum gravity phenomenology has inspired a quantum notion of space-time, which motivates us to study the fate of the relativistic symmetries of a particular model of quantum space-time, as well as its intimate connection with the plausible emergent curved "physical momentum space". We here focus on the problem of Poincare symmetry of $κ$-Minkowski type non-commutative (quantum) space-time, where the Poincare algebra, on its own, remains undeformed, but in order to retain the structure of the space-time non-commutative (NC) algebra, action of the algebra generators on the operator-valued space-time manifold must be enveloping algebra valued that lives in entire phase space i.e. the cotangent bundle on the space-time manifold (at classical level). Further, we constructed a model for a spin-less relativistic massive particle enjoying the deformed Poincare symmetry, using the first order form of geometric Lagrangian, that satisfies a new deformed dispersion relation and explored a feasible regime of a future Quantum Gravity theory in which the momentum space becomes curved. In this scenario there is only a mass scale (Planck mass $m_{p}$), but no length scale. Finally, we relate the deformed mass shell to the geodesic distance in this curved momentum space, where the mass of the particle gets renormalized as a result of noncommutativity. We show, that under some circumstances, the Planck mass provides an upper bound for the observed renormalized mass.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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